Paging and Intercom feature on CUCM

CallManager 6.0 and higher

1. Go to Call Routing > Intercom > Intercom Partition and create a new partition.
2. Go to Call Routing > Intercom > Intercom CSS and create a new CSS that containst the partition created above.
3. Go to Call Routing > Intercom >Intercom Directory Number and create 2 different directory numbers that we will use to communicate. Also associate the CSS created above, and choose a Default Device to which you will assign this particular number.
4. Go to the first phone we will configure under Device > Phone and modify the phone button :
5. It might be necessary to remove one of the options from the left square to make room for the new option; just select an unwanted option and clic on the arrow pointing down to the bottom square. Now, on the right square choose "Intercom [1] - Add a new Intercom", and click on the arrow pointing left to the left square. The option might appear on the left, at the bottom of the list.
6. Save the changes everywhere and reset the phones or apply configuration (depends on the Callmanager version).
7. Click on the Intercom option at the left side of the phone configuration page, this will take you to the Intercom Directory Number page.
8. Look for the "Speed Dial" field, and input the target number. This is the Intercom DN that will go off-hook in speaker mode when you press the Intercom number we are currently configuring. ***NOTE*** If you do fill the Speed Dial field, when pushing your Intercom DN button will open the line and prompt you to enter any Intercom number. Only an Intercom number will be accepted, any regular DN won't work and most likely will ring busy if it doesn't perfectly match an Intercom number you don't know about.
9. Do the same configuration to the other IP Phone assigning it the second Intercom DN we created.
10. With the correct CSS and partitions, and after filling the Speed Dial field on each device, we should now be able to press the button and go off-hook with the other device. You can choose if you want your Intercom line to go off-hook in headset mode or in speaker mode from the line configuration page.

Restrictions

The following models support the feature in both SCCP and SIP mode:

7941
7941G-GE
7942
7945
7961
7961G-GE
7962
7965
7970
7971
7975

The 7931 only supports it in SCCP.

• One Intercom DN, say 200, can't be associated to multiple devices, or in other words, it doest allow sharing. You will get an error similar to "Update failed. Intercom line is not shareable"
• Intercom calls do not follow a coverage path.
• Hold - The system does not allow intercom calls to be placed on hold.
• Call Forwarding - The system does not allow intercom calls cannot be forwarded.
• Transfer - The system does not allow an intercom call to be transferred.
• iDivert - The system does not allow an intercom call to be diverted.
• Call Pickup/Directed Call Pickup - The call pickup groups do not include intercom calls.
• DND - Intercom overrides Do Not Disturb (DND).
• If sufficient bandwidth does not exist, the intercom call fails.
• If two intercom calls are directed to a target, the first one goes through; the second fails with a busy tone.
• Barge and cBarge - Intercom does not work with Barge and cBarge features.
• Conferencing - The system does not allow intercom calls to be conferenced.
• When an active call is being monitored or recorded, the user cannot receive nor place intercom calls.

Related information:

https://supportforums.cisco.com/thread/2182226

 

For more details about the Interactions and Restrictions, please follow the Features and Services Guide pertinent to you Callmanager version:

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_0_1/ccmfeat/fsintrcm.html#wp1103432

 

This feature doesn't provide a voice message broadcating capability (sometimes called paging).

Note: Generally, on Call Manager 4.x the  Intercoms were configured with a speeddial on the Admin phone set to ringdown

to the auto answer DN on the Manager phone. On CUCM 6.X and above it would be a speeddial to a number for example lets

Managers Number be 1000 then on the Admin's Phone add a DN 1000 with auto answer for the manager.

For more details refer Intercom

Callmanager 4.x and below (Document K62352022 applies to these versions)

Cisco CallManager does not have a dedicated intercom feature. However, you can use the Auto Answer feature in Cisco CallManager. Activatving this option or button causes the speaker phone to go off hook automatically when an incoming call is received.

To configure Auto Answer, perform these steps:

 

On the Cisco CallManager Admin page, go to  Device > Phones > Select the Extension. Select Enable the Auto Answer feature.

 

1. Choose one of these options to activate the Auto Answer feature for the  directory number:       
    
   • Auto Answer Off
      
   • Auto Answer with headset
      
   • Auto Answer with speakerphone (intercom)

For more information refer to Cisco IP Phone Configuration.

Paging

Many sites with an existing PBX also have a paging system, allowing users to call  an extension on the PBX that forwards the audio broadcast to overhead  loudspeakers. This concept is useful in workshops, parking lots, and open plan  areas where a called party is not near a telephone handset. PBX manufacturers  may provide dedicated line cards that interface with external paging amplifiers.

The Cisco CallManager needs the Cisco 2610 router to be configured as an H.323  gateway device. The extension number for the paging port is defined under the  Cisco CallManager Route Pattern configuration page, pointing to the Cisco 2610  H.323 gateway.

When the number for the paging system is dialed, a VoIP call is made between the  IP handset to the E&M port on the gateway router. The voice port goes off hook.  This is indicated by the E lead on pin 7 going from open circuit to closed  circuit (with respect to the ground on pin 8). This off hook condition activates  the pager system's control input, and the audio is sent on pins 4 and 5 of the  voice port

For more information, refer to Using Analogue E&M ports to interface to Overhead Paging Systems.

Cisco IPMA Shared

Cisco IPMA Shared line support:

Prerequisites:

• IPMA Service, CTI Manager and Tomcat should be running in CUCM
   
• These are the phones supported for IPMA :
  Cisco 7937 Cisco 7940 Cisco 7941 Cisco 7941G-GE Cisco 7942 Cisco 7945 Cisco 7960 Cisco 7961 Cisco 7961G-GE Cisco 7962 Cisco 7965 Cisco 7970 Cisco 7971 Cisco 7975 Cisco 7985 Cisco IP Communicator Cisco 7906 Cisco 7911 Cisco 7931 Cisco 7941 Cisco 7941G-GE Cisco 7942 Cisco 7945 Cisco 7961 Cisco 7961G-GE Cisco 7962 Cisco 7965 Cisco 7970 Cisco 7971 Cisco 7975

Configuration Procedure:

1. Configure the phones and associate them to the end users:

• The manager IP Phone should have on its primary extension the same number as the secondary line in the assistant’s phone.
• Add the appropriate phone button template (Manager and Assistant)
 

Please note that Manager will use “Standard Shared Mode Manager”

• Under System > Service Parameters > Choose the Server and the Cisco IP Manager Service and enter the parameter for the server and the clusterwide parameters.

 

**You must restart CTI Manager after this configuration.

 

• If you want to use intercom (optional) please refer to this post: https://supportforums.cisco.com/docs/DOC-4194

2- Configure Manager and Assistant End Users:

• 1. Go to the Manager end user and in related links select Manager Config > uncheck Auto config > select the device name which was configured in step 1.1 > select the assistant and line then hit “Save”:
  
   
• Go to the assistant and in the related links go to Assistant Config > uncheck Auto config > select the device name which was configured in step 1.1 > Primary Line should be the one shared with the Manager and so on: 

• Restart CTI Manager and IPMA Service
• Enjoy IPMA with Shared Line Support!